A spray nozzle system for a bidet includes a nozzle casing and a rotating member within the nozzle casing. The rotation of the rotating member changes a water output pattern of the nozzle. A first inlet pipe to the nozzle casing is positioned to cause the rotating member to rotate upon receiving fluid flow. A second inlet pipe to the nozzle casing is positioned to suppress rotation of the rotating member upon receiving fluid flow. A controller is configured to vary the relative fluid flow provided to the first inlet pipe and the second inlet pipe, thereby controllably varying the water output pattern of the nozzle.